I'm reading it how I think you are Allyrion. 10s duration and all single target weapon skills you use will have a bonus of another strike sans the bonuses. So if you were to crit you'd get the crit on the weaponskill, but you'd get an extra attack without the crit (or bonus damage if it's part of a combo). So if you were to use this one the move that refreshes Huton you'd only get the refresh effect one time, and not two.